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<Title>Circular Label Layout</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Circular Label Layout</p>
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<img src="images/circlelabelpie0.png" width='310' height='310'>&nbsp;&nbsp;<img src="images/circlelabelpie1.png" width='310' height='310'>
<br><br>
This example demonstrates label positioning in the "circular label layout" method.<br><br>
By default, in "circular label layout", the sector labels will be external and close to the pie perimeter.<br><br>
The <a href="PieChart.setLabelPos.htm">PieChart.setLabelPos</a> method can be used to control the distance between the labels and the pie perimeter, and add join lines to connect the labels to the sectors. The join lines are useful if the labels are far away from the pie perimeter.<br><br>
The distance between the sector labels and the pie perimeter can be negative, in which case the labels will be internal to the pie.
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<p class="heading1a">Source Code Listing</p>
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<b>[JSP Version]</b> jspdemo/circlelabelpie.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%!
// Function to create the demo charts
void createChart(WebChartViewer viewer, int chartIndex)
{
    // The data for the pie chart
    double[] data = {42, 18, 8};

    // The labels for the pie chart
    String[] labels = {"Agree", "Disagree", "Not Sure"};

    // The colors to use for the sectors
    int[] colors = {0x66ff66, 0xff6666, 0xffff00};

    // Create a PieChart object of size 300 x 300 pixels. Set the background to a gradient color
    // from blue (aaccff) to sky blue (ffffff), with a grey (888888) border. Use rounded corners and
    // soft drop shadow.
    PieChart c = new PieChart(300, 300);
    c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight() / 2, 0xaaccff, 0xffffff), 0x888888)
        ;
    c.setRoundedFrame();
    c.setDropShadow();

    if (chartIndex == 0) {
    //============================================================
    //    Draw a pie chart where the label is on top of the pie
    //============================================================

        // Set the center of the pie at (150, 150) and the radius to 120 pixels
        c.setPieSize(150, 150, 120);

        // Set the label position to -40 pixels from the perimeter of the pie (-ve means label is
        // inside the pie)
        c.setLabelPos(-40);

    } else {
    //============================================================
    //    Draw a pie chart where the label is outside the pie
    //============================================================

        // Set the center of the pie at (150, 150) and the radius to 80 pixels
        c.setPieSize(150, 150, 80);

        // Set the sector label position to be 20 pixels from the pie. Use a join line to connect
        // the labels to the sectors.
        c.setLabelPos(20, Chart.LineColor);

    }

    // Set the pie data and the pie labels
    c.setData(data, labels);

    // Set the sector colors
    c.setColors2(Chart.DataColor, colors);

    // Use local gradient shading, with a 1 pixel semi-transparent black (bb000000) border
    c.setSectorStyle(Chart.LocalGradientShading, 0xbb000000, 1);

    // Output the chart
    viewer.setChart(c, Chart.SVG);

    // Include tool tip for the chart
    viewer.setImageMap(c.getHTMLImageMap("", "", "title='{label}: {value} responses ({percent}%)'"))
        ;
}
%&gt;
&lt;%
// This example includes 2 charts
WebChartViewer[] viewers = new WebChartViewer[2];
for (int i = 0; i &lt; viewers.length; ++i) {
    viewers[i] = new WebChartViewer(request, "chart" + i);
    createChart(viewers[i], i);
}
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Circular Label Layout&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Circular Label Layout
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here are the chart images ****** --&gt;
    &lt;%
        for (int i = 0; i &lt; viewers.length; ++i) {
            out.write(viewers[i].renderHTML(response));
            out.write(" ");
        }
    %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
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<br><hr class="separator"><div class="copyright">&copy; 2022 Advanced Software Engineering Limited. All rights reserved.</div>
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